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1 July 1990 Conversion noise measurement for front and back x-ray intensifying screens
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Two years ago in these proceedings1 we reported on a new method for measuring the noise associated with the variation in light output of x-ray intensifying screens caused by absorption of x-ray quanta of equal energy, together with data for the Kodak Lanex intensifying screens. We have extended our measurements to screens in the back-screen configuration, in addition to the front-screen configuration previously reported. By back-screen configuration we mean that the x-rays are incident from the same side as that from which the emission will be measured. This has been realized by means of an integrating sphere, which allows screens to be mounted as back or front screens; or even as a pair. The light emission statistics (including the mean light output and the Swank I factor) for some Kodak Lanex intensifying screens in the front and back-screen configurations are given and compared. These data can provide a basis for understanding the depth dependent emission probability which in turn provides a useful test of theories of light propagation within the screen.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David P. Trauernicht and Richard L. Van Metter "Conversion noise measurement for front and back x-ray intensifying screens", Proc. SPIE 1231, Medical Imaging IV: Image Formation, (1 July 1990);

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